How to get the screen width and height only in landscape orientation , i have two ipad 4 tablets and on one of them it takes me the landscape width & height , and on the other one it takes me the portrait one even if it's orientation is on lanscape
at the moment i am using this but its not working well
CGFloat width = self.view.bounds.size.width;
CGFloat height = self.view.bounds.size.height;
Use [UIScreen mainScreen].bounds you'll have the same.
Discussion
This rectangle is specified in the current coordinate
space, which takes into account any interface rotations in effect for
the device. Therefore, the value of this property may change when the
device rotates between portrait and landscape orientations.
Use [UIScreen mainScreen].nativeBounds in iOS8 only to get the portrait-locked bounds.
Discussion This rectangle is based on the device in a
portrait-up orientation. This value does not change as the device
rotates.
Swift 3
let pixelWidth = UIScreen.main.nativeBounds.width
let pixelHeight = UIScreen.main.nativeBounds.height
let pointWidth = pixelWidth / UIScreen.main.nativeScale
let pointHeight = pixelHeight / UIScreen.main.nativeScale
print ("Pixels: \(pixelWidth) x \(pixelHeight)")
print ("Points: \(pointWidth) x \(pointHeight)")
On a 6s Plus will print...
Pixels: 1080.0 x 1920.0
Points: 414.0 x 736.0
Related
I am working on an ObjectiveC app in which I need to set the width and height of a uiview in pixels and than scale that uiview equal to the devices width. The width and height values in pixels are fixed ( let say 900 px x 500 px).
Currently I am doing this,
UIScreen* mainScreen = [UIScreen mainScreen];
CGRect frame = CGRectMake(0, 0, 900.0, 500.0);
[view setFrame:frame];
CGFloat valScale = mainScreen.bounds.size.width/900.0;
[view setContentScaleFactor:valScale];
But this is not giving me the desired values.
What should I do?
(P.S) Does view.frame.size.width return the width in pixels or points?
Hi for scaling a view you can use the transform property. Say you wish to scale your UIView by a factor of 2 then you can use.
self.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, 2, 2);
CGRect width and height returns points not pixels. One point has two pixels for 2x devices like iPhone 6,7 and three pixels for 3x devices like iPhone 6 Plus,7 Plus.
For more detail you can refer this Apple's documentation link.
I have a very hard time to display UI properly on iPhone X, based on the screenshot, UI on iPhone X always get longer than normal iphones, is there any solutions on how to scale and display the ratio properly across all iPhone sizes? Thanks.
make imageView.width proportional to imageview.height and not to screen height.
i think in this case height-to-width will be in 4:3 ratio
Also calulate youe imageview height based on screenheight with safe area excluded from it.
if #available(iOS 11.0, *) {
if ((UIApplication.shared.keyWindow?.safeAreaInsets.top)! > CGFloat(0.0)) {
let safeArealength = UIApplication.shared.keyWindow?.safeAreaInsets.top + UIApplication.shared.keyWindow?.safeAreaInsets.bottom
height = ratio * (UIScreen.main.bounds.size.height - safeArealength)
width = 0.75 * height //guess the ratio is 4:3
}
}
here the ratio is the proportion between the imageview size and the screensize.
I'm making a full screen camera for the iPhone 5 and have the following code to scale the 4:3 camera to fill the entire screen, which is a 2:3 ratio. The left and right sides bleed off the screen.
I have to move the cameraView down 71 points in order for it to center with the screen. Otherwise, there's a black bar at the bottom. I'm not quite sure why. Because I don't know why this is happening, I can't figure out how to dynamically code the adjustment to accommodate the iPhone 6 and 6 Plus.
Any help is appreciated.
// get the screen size
CGSize screenSize = [[UIScreen mainScreen] bounds].size;
// establish the height to width ratio of the camera
float heightRatio = 4.0f / 3.0f;
// calculate the height of the camera based on the screen width
float cameraHeight = screenSize.width * heightRatio;
// calculate the ratio that the camera height needs to be scaled by
float ratio = screenSize.height / cameraHeight;
//This slots the preview exactly in the middle of the screen by moving it down 71 points (for iphone 5)
CGAffineTransform translate = CGAffineTransformMakeTranslation(0.0, 71.0);
self.camera.cameraViewTransform = translate;
CGAffineTransform scale = CGAffineTransformScale(translate, ratio, ratio);
self.camera.cameraViewTransform = scale;
This finally clicked in my head. Since we know that the camera will always be the same length of the screen width:
//getting the camera height by the 4:3 ratio
int cameraViewHeight = SCREEN_WIDTH * 1.333;
int adjustedYPosition = (SCREEN_HEIGHT - cameraViewHeight) / 2;
CGAffineTransform translate = CGAffineTransformMakeTranslation(0, adjustedYPosition);
self.imagePicker.cameraViewTransform = translate;
I have an image mySprite#2x.png it's dimensions 1240 x 1240 pixels or 620 x 620 points.
I want to use it for all iPhone models (different screen sizes). All I want it to resize it, but I can't figure out how to do this properly.
Here is what's go wrong:
let sprite = SKSpriteNode(imageNamed:"mySprite")
sprite.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))
println(sprite.size)
sprite.size = CGSize(width: 300, height: 300)
println(sprite.size)
println(self.view?.frame.size)
self.addChild(sprite)
Here is log from testing on the iPhone 4S:
(620.0,620.0)
(300.0,300.0)
Optional((480.0,320.0))
log looks ok, but on screen I can see that image is bigger than iPhone 4S width. It's width and height (it's a square) almost as high as iPhone 4 screen height (about 440 pts).
Scene scaleMode is AspectFill.
Scene and sprite xScale and yScale = 1.0
I don't understand what I'm doing wrong.
Based on the log message from your view's frame, the width is 480 and the height is 320, meaning your view is in landscape mode.
If your SKScene's size is set to the size of your view in portrait mode, using scaleMode AspectFill will stretch the width of your scene from 320 to 480.
This means your SKSpriteNode will seem 450pts instead of 300pts.
You probably want to use SKSceneScaleModeResizeFill instead?
I want to get the width and height of the screen, with this code ...
float screenWidth = [UIScreen mainScreen].bounds.size.width;
float screenHeight = [UIScreen mainScreen].bounds.size.height;
NSLog(#"%f %f",screenWidth, screenHeight);
I get always 320 480 , but these aren't the true measures of the simulator. Now I'm testing on a retina simulator with more resolution, but i always get 320 480
I think your answer can be found here: in iPhone App How to detect the screen resolution of the device
Its the scale that interests you as well. Use CGFloat screenScale = [[UIScreen mainScreen] scale]; to find out the scale.
When positioning elements your points should always be in non-retina scale. Size of the screen for 3.5 inch is 320x480 units and 320x568 for the 4 inch screen. The pixel resolution is times two for retina screens.